commit ae6377c08e5c3735c65212ba9ff86fa51af7d68a
author msarett <msarett@google.com> Tue Aug 23 14:36:20 2016 -0700
committer Commit bot <commit-bot@chromium.org> Tue Aug 23 14:36:20 2016 -0700
tree 57ae0f599ba46361bc14dccb7a89f8b4777afcb9
parent 19fe41e85e6ce3e78b3a69fce1cf28edf937027d

Make singleton SkColorSpaces thread safe

SkColorSpaces may be once-ptrs, so we can reuse common color spaces.
This means that they must be thread safe.  SkMatrix44 is not
thread safe because it maintains a mutable type mask.

This CL ensures that we precompute the type mask so we
can use const SkMatrix44's safely.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2277463002

Review-Url: https://codereview.chromium.org/2277463002